31328680 has 32 divisors (see below), whose sum is σ = 71461800. Its totient is φ = 12358656.

The previous prime is 31328651. The next prime is 31328681. The reversal of 31328680 is 8682313.

It can be written as a sum of positive squares in 4 ways, for example, as 28579716 + 2748964 = 5346^2 + 1658^2 .

It is not an unprimeable number, because it can be changed into a prime (31328681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445 + ... + 8284.

Almost surely, 2^31328680 is an apocalyptic number.

It is an amenable number.

31328680 is an abundant number, since it is smaller than the sum of its proper divisors (40133120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31328680 is a wasteful number, since it uses less digits than its factorization.

31328680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10813 (or 10809 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 31328680 is about 5597.2028728643. The cubic root of 31328680 is about 315.2443891636.

The spelling of 31328680 in words is "thirty-one million, three hundred twenty-eight thousand, six hundred eighty".